diff --git a/changelog/12582.txt b/changelog/12582.txt
new file mode 100644
index 0000000000000..6e5c0c916fa59
--- /dev/null
+++ b/changelog/12582.txt
@@ -0,0 +1,3 @@
+```release-note:improvement
+api: Support VAULT_HTTP_PROXY environment variable to allow overriding the Vault client's HTTP proxy
+```
diff --git a/website/content/docs/commands/index.mdx b/website/content/docs/commands/index.mdx
index 9927152503c8a..cefdeeed82997 100644
--- a/website/content/docs/commands/index.mdx
+++ b/website/content/docs/commands/index.mdx
@@ -323,6 +323,12 @@ can be supplied. If a MFA method expects multiple credential values, or if there
 are multiple MFA methods specified on a path, then the CLI flag `-mfa` should be
 used.
 
+### `VAULT_HTTP_PROXY`
+
+HTTP proxy location which should be used to access Vault. When present, this
+overrides any other proxies found in the environment. Format should be
+`http://server:port`.
+
 ## Flags
 
 There are different CLI flags that are available depending on subcommands. Some